KOI-1783.02
KOI-1783.02 is a Neptune-like planet orbiting KOI-1783 in the constellation Cygnus. It lies about 2,824 light-years from Earth and was discovered in 2020 using the transit method.
How Big Is KOI-1783.02?
KOI-1783.02 has a radius of 5.44 times that of Earth. Its mass is 15.0 times that of Earth, giving it a density of 0.51 g/cm³ — closer to gas planets like Jupiter (1.33 g/cm³).
Is KOI-1783.02 in the Habitable Zone?
The position of KOI-1783.02 relative to the habitable zone of KOI-1783 cannot be precisely determined from the available orbital data.
Habitable zone of KOI-1783: 0.893–2.097 AU (conservative: 1.131–1.988 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
See the full interactive habitable-zone view in the Exoplanet Explorer app ›
Temperature on KOI-1783.02
KOI-1783.02 receives 2.49 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on KOI-1783.02 — one full orbit around KOI-1783 — lasts 284.2 Earth days, between the years of Mercury (88 days) and Earth (365 days).
How Was KOI-1783.02 Discovered?
KOI-1783.02 was discovered in 2020 using the transit method, with observations from Kepler.
The transit method watches a star for the tiny, regular dip in brightness that occurs when a planet crosses in front of it. The depth and timing of these dips reveal the planet's size and orbital period.
How Far Away Is KOI-1783.02?
KOI-1783.02 is 2,823.6 light-years (865.7 parsecs) from Earth. Light arriving here tonight left the planet about 2,824 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 49,695,360 years to make the journey.
Earth Similarity Index
The Earth Similarity Index (ESI) scores how physically similar a planet is to Earth, from 0 to 1, based on radius, density, escape velocity and surface temperature. KOI-1783.02 scores 0.44, ranking #359 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: KOI-1783
KOI-1783
- Surface temperature
- 5,922 K (Sun: 5,772 K)
- Mass
- 1.08 M☉
- Radius
- 1.14 R☉
The KOI-1783 Planetary System
KOI-1783.02 is one of 2 known planets in the KOI-1783 system. Its siblings:
- KOI-1783.01 (Cold Gas Giant)
KOI-1783.02 — Complete Data
| Radius | 5.440 Earth radii (0.485 Jupiter radii) |
|---|---|
| Mass | 15.00 Earth masses (0.047 Jupiter masses) |
| Density | 0.51 g/cm³ (Earth: 5.51) |
| Orbital period | 284.21 days |
| Stellar irradiation | 2.49× Earth |
| Earth Similarity Index | 0.44 |
| Distance from Earth | 2,823.6 light-years (865.7 parsecs) |
| Constellation | Cygnus |
| Discovery method | Transit |
| Discovery facility | Kepler |
| Discovery year | 2020 |
Data: NASA Exoplanet Archive, last updated 2020-05-04. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About KOI-1783.02
Is KOI-1783.02 habitable?
KOI-1783.02 is not known to orbit within the habitable zone of KOI-1783, and as a Neptune-like planet it is an unlikely candidate for life as we know it.
How far away is KOI-1783.02?
KOI-1783.02 is about 2,824 light-years from Earth in the constellation Cygnus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 49,695,360 years to get there.
How big is KOI-1783.02 compared to Earth?
KOI-1783.02 has 5.44 times the radius of Earth and about 15.0 times its mass.
How long is a year on KOI-1783.02?
One orbit around KOI-1783 takes 284.2 Earth days.
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